baber/WOPTO huggingface dataset:
Patent KR-880001734-B1 (KR)
Title: Process and apparatus for making the molten glass
Inventor: PECORARO GEORGE ANTHONY
IPC: C03B18/04
Filed: 1982-01-26
Granted: 1988-09-10
Abstract: An improved refractory threshold for use with a molten glass stream which normally causes more rapid wear in the central region has additional cooling provided in the region prone to the highest wear rate.  The temp. variations produced are sufficient to render the erosion rates uniform over the entire glass contact surface. Since the profile of the threshold remains relatively unchanged, a longer service life can be obtd.
Patent KR-880001387-B1 (KR)
Title: Lead wire winding device
Inventor: HIRADA MORIICHI
IPC: H01F41/06
Filed: 1982-03-27
Granted: 1988-07-29
Abstract: The device is used for winding the lead wires (6) of circuit elements such as capacitors (5) around the base plates (2) of electronic components such as intermediate-frequency transformers or pulse one of the electric components having terminal pins (3) on its base plates and a lead wire moving mechanism movable upwardly and downwardly around the electric component on the holder.  A clip (13) grips one of the lead wires, and a clip operating mechanism closes and opens the clip.  Pref. the rotatable holder is connected to a driving source via a clutch and is supported by arms secured to an intermittently rotatable index table.
Patent KR-830002914-B1 (KR)
Inventor: RYU CHONG KEE
IPC: C08K7/00
Filed: 1982-03-31
Granted: 1983-12-30
Abstract: 내용 없음.
Patent KR-860000872-B1 (KR)
Title: Process for the preparation of benzophenon
Inventor: YAMAKUCHI AKIHIRO
IPC: C07C45/00
Filed: 1982-09-17
Granted: 1986-07-11
Abstract: Benzophenone derivatives having the formula R-C6H4-CO-C6H4-R used as intermediates of fine chemicals are prepared from 1,1-bis (aryl)- 2,2,2-trichloroethanol (III). This is done by treating them with alkali, e.g., hydroxide or carbonate of alkali metal, in water or an organic solvent at 0 - 200 ≰C; where R = H, halogen, alkyl, phenyl, alkoxy, or phenoxy. The mole ratio of alkali to (III) is 0.2 - 10.
Patent KR-900007926-B1 (KR)
Title: Digital tone control arangement
Inventor: EGGERMONT LUDWIG D J
IPC: H03H17/04
Filed: 1983-03-28
Granted: 1990-10-23
Abstract: The digital tone control arrangement comprises a recursive digital filter whose transfer function contains as many poles as there are zeros. The recursive filter also comprises a recursive portion and a non-recursive portion each receiving filter coefficients which are stored in a memory. So as to limit the total number of filter coefficients the memory is divided into a first memory field for storing a first sub-group of filter coefficients and into a number of second memory fields in each of which a second sub-group of filter coefficients is stored. Using a switching device the first sub-group of the filter coefficients is applied either to the non-recursive portion or to the recursive portion and a selected second sub-group of filter coefficients is applied to that portion.
Patent KR-890002734-B1 (KR)
Title: Structural metal sheet and method for forming the same
Inventor: FUKUYORI KAZUSIGE
IPC: B61D17/08
Filed: 1983-08-11
Granted: 1989-07-26
Abstract: The method comprises the steps of plastically working a sheet material for forming a bead portion.  A compressive stress applied to the bead is several times as large as the yield point or proof stress of the sheet material so that residual compressive stress occurs in the bead portion after removing the application of the compressive stress.  Both the forming of the bead portion and the application of the pressure to the bead portion are effected locally on the sheet material, and are repeated to complete the formation of the bead.
Patent KR-880001094-B1 (KR)
Title: Stabilation method of pharmaceutical compositions
Inventor: RICHARDSON BETTY L
IPC: A61P31/04
Filed: 1983-09-09
Granted: 1988-06-29
Abstract: Stable solid β-lactam antibiotics for injections contain the antibiotic in acidic or amphoteric form together with a basic compd. in the presence of an atm. contg. >=1% by vol. CO2. The base is present at 0.8-6.0 equiv/equiv antibiotic.  Thus, 14.818kg ceftazidime and 1.725kg Na2CO3 are mixed under sterile conditions and each 250mg of the mixt. is poured into injection vials and flushed with CO2 before sealing with a rubber and metal closure.
Patent KR-910000821-B1 (KR)
Title: Amorphous antipilferage maker
Inventor: ANDERSON PHILIP M
IPC: G08B13/24
Filed: 1984-02-02
Granted: 1991-02-09
Abstract: A magnetic theft detection system marker is adapted to generate magnetic fields at frequencies that (1) are harmonically related to an incident magnetic field applied within an interrogation zone and (2) have selected tones that provide the marker with signal identity. The marker is an elongated, ductile strip of amorphous ferromagnetic material having a value of magnetostriction near zero that retains its signal identity under stress.
Patent KR-890002933-B1 (KR)
Title: Preparation of low density low modulus ethylene copolymers in a fluidized bed
Inventor: KAROL FREDERICK J
IPC: C08F10/02
Filed: 1984-03-28
Granted: 1989-08-12
Abstract: Copolymers of ethylene and min. 6 mol.% 3-8C α-olefins, density below 0.91g/cm3 and 1% secant modulus below 140000KPa, by a continuous process in fludized bed without particle agglomeration by contacting, in fludized bed reaction zone at 10-80≰C and pressures up to 7000KPa.  (A) a gaseous mixt. of ethylene and copolymers, in mol ratio 0.35-8:1, with min. 25 mol.% diluent gases; and (B) particles of a catalyst system comprising a precursor compsn. of formula (Mg)mTi(OR)nXp(E)q, diluted with inert carrier material and completely activated with an organo-Al cpd. of formula AlR'2X'eHf such that total Al:Ti mol. ratio in the reaction zone is 10-400:1, R=1-14C etc., ED=electron donor cpd..
Patent KR-870001632-B1 (KR)
Title: Loading arrangement of video tape recorder
Inventor: CHOE JONG-HYOK
IPC: G11B15/18
Filed: 1984-12-31
Granted: 1987-09-17
Abstract: This invension relates to a VTR loading driver which produced large rotatory force by small displacement in small spale and reduce loading force using gear with elliptical pitch king at intermediate stage.  Then an intermediate gear is connected between the driving gear and the next one, and the rack gear is used for can grooves. And the intermediate gear and driving gear are connected to each other.  For the another condition, both the middle gear and the ring gear should satisties following conditions r1 + r2 =L and PC = QC which explains pitch interval.
Patent KR-940000969-B1 (KR)
Inventor: TAKAHASHI GENICHI
IPC: G06Q40/04
Filed: 1985-02-04
Granted: 1994-02-07
Abstract: 내용 없음.
Patent KR-890004216-B1 (KR)
Title: A transferring apparatus for electric power
Inventor: SHAITO SUZUO
IPC: H02P1/30
Filed: 1985-02-28
Granted: 1989-10-27
Abstract: Before initiating connection between the power converter and the induction motor, a low frequency detector circuit detects whether the frequency output of the converter falls within a specified frequency range and if so an appropriate signal is applied to the current control circuits.  Since AC current corresponds to DC current and the magnitude of it is dependant upon the reference current which equates to the signal, then the AC current is similarly dependant on.  The peak potential or magnitude of signal is selected such that it permits a value of capable of providing sufficient motor torque to start the load.
Patent KR-880000131-B1 (KR)
Title: Processing method for dihydropyridine
Inventor: ALDER DAVID
IPC: C07D498/04
Filed: 1985-05-11
Granted: 1988-03-12
Abstract: Dihydropyridines (I) were prepd. by reducting II or III.  In formula R is substd. aryl or heteroaryl; R1, R2 are C1-4 alkyl or 2- methoxyehyl; Y is -(CH2)n-; n is 2,3 or 4.  Thus, 2g 2-⇔4- (2chlorophenyl)-3-ethoxycarbonyl-5-methoxycabonyl-6-methoxycarbonyl6- methyl-1,4-dihydropyrido-2-yl!methoxy! acetic acid was reacted with 10ml tetrahydrofuran to give 0.6g 4-(2-chlorophenyl)3ethoxycarbonyl- 2-(2-hydroxyethoxymethyl)-5-methoxycarbonyl-6-methyl -1,4- dihydropyridine.
Patent KR-930000318-B1 (KR)
Title: 승용차용 공기 레이디얼 타이어
IPC: B60C9/18
Filed: 1985-05-31
Granted: 1993-01-15
Abstract: 내용 없음.
Patent KR-900002808-B1 (KR)
Title: Image sensor
Inventor: SATO HAJIME
IPC: H04N1/031
Filed: 1985-06-07
Granted: 1990-04-30
Abstract: A number of linearly arranged line sensors includes a number of linearly arranged picture elements acting as photodetectors. The width of elements at the ends of each linear arrangement is smaller in the direction of the linear arrangement than the one of elements in the central portion.  An amplifier having a gain of 2 makes the output signal of the smaller one to be equal in level to that of the centrally positioned photodetector.  The output signals are converted into signals of a time-divided signal row by a shift gate.  The photodetector elements are formed on a single semiconductor substrate together with the amplifier.
Patent KR-940009280-B1 (KR)
Title: Antibiotic a 40926 complex and antibiotic a 40926 factor
Inventor: SELLBA ENRICO
IPC: C12P1/06
Filed: 1985-10-11
Granted: 1994-10-06
Abstract: The present invention concerns a new antibiotic substance arbitrarily denominated antibiotic A 40926 complex and its factors antibiotic A 40926 factor A antibiotic A 40926 factor B. antibiotic A 40926 factor B<sub>o</sub>, antibiotic A 40926 factor PA and antibiotic A 40926 factor PB, a process for producing them by culturing the new strain Actinomadura sp. ATCC 39727 or an A 40926 producing variant or mutant thereof and the use of these new antibiotic substances in the treatment of infectious diseases involving microorganisms susceptible to them. The antibiotic substances of the invention are glycopeptidic substances belonging to the vancomycin class or antibiotics which have binding capacity to Acyl-D-Alanyl-D-Alanine.
Patent KR-940004778-B1 (KR)
Inventor: EMERY FRANKLIN T
IPC: G01K3/02
Filed: 1986-02-05
Granted: 1994-05-28
Abstract: 내용 없음.
Patent KR-900000335-B1 (KR)
Title: Video signal reproduction apparatus
Inventor: YAMANISHI KAZUHIRO
IPC: H04N9/83
Filed: 1986-03-26
Granted: 1990-01-25
Abstract: The apparatus for reproducing video signals recorded by the low frequenc bandwidth conversion method includes a dividing process for dividing the reproduced video signals into the covnerted signal with low frequency band width and frequency modulated signals, a demodulating process for demodulating the frequency modulated signal for obtaining reproducing the brightness signal, a first frequency modulating process for frequency modulating the converted signal with low frequency band width for obtaining a first subcarrier signal, a second frequency modulating process for obtaining a second subcarrier signal, and a process for obtaining color video signal.
Patent KR-920001451-B1 (KR)
Inventor: OKKAMOTTO AKKIRA
IPC: H01C7/00
Filed: 1986-04-01
Granted: 1992-02-14
Abstract: 내용 없음.
Patent KR-910000896-B1 (KR)
Title: Process for preparing dl-alpha-tocoperol acetate
Inventor: KIM EU-CHUNG
IPC: C07D311/72
Filed: 1986-06-11
Granted: 1991-02-12
Abstract: A process for preparing dl-alpha-tocopheryl acetate (I) comprises condensation reaction of 2,3,5-trimethylhydroquinone of formula (II) and isophytol of formula (III) in the ethylenedichloride solvent to produce dl-alpha-tocopherol of formula (IV), and an acylation reaction of (IV) and anhydrous acetic acid in the presence of an acid catalyst selected from p- toluenesulfonic acid, methanesulfonic acid or trifluoroacetic acid. Pref. the  catalyst for the condensation reaction is a mixture of ZnCl2/Zn/H3PO4 [(II):ZnCl2/Zn/H3PO4= 1:0.1-0.6/0.05-0.2/0.1-0.5 .
Patent KR-890005087-B1 (KR)
Title: Machine tool
Inventor: WINKLER HANS-HENNING
IPC: B23Q3/155
Filed: 1986-06-12
Granted: 1989-12-11
Abstract: The machine tool has a spindle head (11) and a tool store (29) with a number of tool holders (17) in which tools (16) are mounted.  The tool holders are mounted on an endless belt which runs in a plane which is at right angles to the vertical axis (19) of the spindle head.  The machine further has two grips (20,20a) which are used to transport the tool holders (17) between positions in which the tools are loaded on the store (29) or taken from this store and positions on the spindle head (15).  The endless belt is U-shaped.  The spindle head (15) is mounted in front of and below the ends (30',30a') of the 'U' and is rigidly connected to the tool store in the direction of the centreline (19).
Patent KR-890001180-B1 (KR)
Title: Fold-up rack for screwdrivers and the like
Inventor: WALLACE CLYDE R
IPC: A47F7/00
Filed: 1986-06-16
Granted: 1989-04-26
Abstract: The rack for hand tools, such as screw-drivers, is made from a flat plastics moulding which has two parallel lines (14) of reduced thickness.  These lines form hinges and enable the moulding to be folded to a cross-section forming a right angled triangle.  One edge of the moulding is rounded (38) and fits with a snap action in a groove (36) in the opposite edge to produce a rigid structure.  One of the sides adjacent to the right angle has holes for fixing screws.  The other two sides have holes to receive the shanks of the tools with the horizontal side (20) supporting the tool handles.
Patent KR-940003186-B1 (KR)
Inventor: KIDAMI DETSU
IPC: B29C48/21
Filed: 1986-06-27
Granted: 1994-04-15
Abstract: 내용 없음.
Patent KR-900002621-B1 (KR)
Title: Complementary semiconductor memory device
Inventor: NAKANO TOMIO
IPC: G11C11/00
Filed: 1986-08-13
Granted: 1990-04-20
Abstract: The semiconductor device has a substrate of a first conductivity type including a well of a second conductivity type opposite to the first conductivity type.  The semi-conductor device consists of a bias potential generating circuit for generating a potential in the substrate or the well; a potential detecting circuit for detecting a potential of the substrate or the well and a gate circuit.  The gate circuit is connected to the potential detecting circuit and to an internal circuit and applies an enable signal to the internal circuit in accordance with the detected potenial of the substrate or the well.  Consequently, latch-up of parasitic transistors in a CMIS- inverter circuit of the semiconductor device can be prevented.
Patent KR-900008581-B1 (KR)
Title: 고무타이어의 가스 가황방법
IPC: B29C33/02
Filed: 1986-11-10
Granted: 1990-11-26
Abstract: 내용 없음.
Patent KR-930009658-B1 (KR)
Inventor: POLKER ROBERDA
IPC: H04B14/04
Filed: 1985-05-17
Granted: 1993-10-08
Abstract: 내용 없음.
Patent KR-950001025-B1 (KR)
Inventor: RANG HANS-JOHEN
IPC: A61K31/44
Filed: 1987-02-20
Granted: 1995-02-07
Abstract: 내용 없음.
Patent KR-950001380-B1 (KR)
Inventor: IGANOUE TAKAMITSU
IPC: A61F13/15
Filed: 1987-03-31
Granted: 1995-02-18
Abstract: 내용없음.
Patent KR-950005836-B1 (KR)
Inventor: HAMMAN DENVER C
IPC: F16B17/00
Filed: 1987-04-13
Granted: 1995-05-31
Abstract: 내용 없음.
Patent KR-900000367-B1 (KR)
Title: Substituted isoquinoline derivatives and antiulcer agents and their preparations
Inventor: HIRAI GENTARO
IPC: A61K31/415
Filed: 1987-07-01
Granted: 1990-01-25
Abstract: A compound of formula (I) and its pharmaceutically accetable salt are prepd. by reacting a compound of formula (I) with a compound of formula (III) or (IV).  In the formulas, R is H, hydroxy, methoxy or trifluoromethyl ; R1 and R4 are H or C1-5 alkoxy, respectively ; R2 is H, substd. C1-5 alkoxy, allyloxy or propionyloxy ; R3 is H, substd. C1-5 alkoxy, propionyloxy, allyloxy or benzyloxy ; R5 is H, C2-4 alkoxycarbonyl, C2-5 acyloxy methyl or phthalidyl ; n is 0 or 1.  (I) is useful as an antiulcer agent.
Patent KR-960005349-B1 (KR)
Inventor: LANDT JEREMY A
IPC: G06Q10/08
Filed: 1987-07-14
Granted: 1996-04-24
Abstract: 내용 없음.
Patent KR-950010906-B1 (KR)
Inventor: RIDDERS JOHANNES A M
IPC: H01J5/56
Filed: 1987-12-08
Granted: 1995-09-25
Abstract: 내용 없음.
Patent KR-910002324-B1 (KR)
Title: Circuits for detecting clock pulses of conditioned diphase modulation encoding
Inventor: SUH JUNG-KYO
IPC: H04L7/00
Filed: 1988-03-31
Granted: 1991-04-11
Abstract: The line-coding receive data is shifted by the sampling clock so that  the  input  and  output  (I/O)  data  shows  smoe  phase difference which is used for  extracting  the  bit  clock  of  the conditioned diphase (CDP). The  circuit  includes  a  first  shift registor (100) for sampling the  line  coding  receive  data  with sampling clock being greater than the transmission  rate  so  that the I/O data shows some phase difference, a second shift  registor (200) connected to the first shift registor to  shift  the  output data of the first shift registor,  a  third  and  a  fourth  shift registors (300,400) connected to the second and  the  third  shift registors respectively to perform the same function, a first EX-OR gate (500) for EX-OR gating the output data of the first  and  the second shift registors to detect the phase  difference,  a  second EX-OR gate (600) for performing the same operations to  the  third and the fourth shift registors, and an OR gate (700) for OR gating the output of the EX-OR gates to extract the bit clock.
Patent KR-910006435-B1 (KR)
Inventor: REIFENHAUSER HANS
IPC: D01G25/00
Filed: 1988-04-07
Granted: 1991-08-24
Abstract: 내용 없음.
Patent KR-970006645-B1 (KR)
Inventor: WATANABE NOBUHISA
IPC: G06F13/40
Filed: 1988-04-20
Granted: 1997-04-29
Abstract: 내용없음.
Patent KR-910001362-B1 (KR)
Title: Ferroelectric ceramics
Inventor: HIRAI NOBUKI
IPC: C04B35/49
Filed: 1988-07-12
Granted: 1991-03-04
Abstract: Ferroelectric ceramics represented by xPbTiO3-yPbZrO3-zPb(Mg1/3Nb2/3)O3-mSrTiO3-nSnO2-pZnO-qBi2O3-rX wherein x,y,z,m,n,p,q and r represent amounts by mole, respectively, with the proviso that x+y+z being 1, X is at least one oxide selected from the group consisting of Dy2O3, Ta2O5, and Y2O3, and wherein x is from 0.25 to 0.50, Y is from 0.05 to 0.70, z is from 0.05 to 0.70, m is from 0 to 0.10, n is from 0 to 0.04, p is from 0 to 0.04, q is from 0 to 0.02 and r is from 0.005 to 0.02. The disclosed ferroelectric ceramics have increased relative dielectric constant and/or electromechanical coupling factor, and are suitable for use as actuators.
Patent KR-930006371-B1 (KR)
Inventor: MORI SANAE
IPC: F04C2/08
Filed: 1988-08-30
Granted: 1993-07-14
Abstract: 내용 없음.
Patent KR-900007000-B1 (KR)
Title: Novel candida utilis and process for production of protein
Inventor: KOREA ADVANCED INSTITUTE OF SC
IPC: C12N1/20
Filed: 1988-10-07
Granted: 1990-09-25
Abstract: A single cell protein (SCP) is produced by cultivating yeast. The yeast is a candida sp., esp. candida utilis SH8636(I). (I) is cultured in the medium contg. 120g glucose soln. contg. 50% glucose, 40% corn steep liquor, 8g urea, 0.1g sodium chloride, 12mg FeSO4, 2mg MnSO4, 2mg CuSO4 and 0.2g antiforming agent at pH 3.54.0, 30 deg.C and atmospheric pressure for 12 hrs. The SCP is obtained by centrifuging the culture broth and drying at 60 deg.C for 48 hrs.
Patent KR-970007932-B1 (KR)
Title: Compositions
Inventor: NIELSEN RUBY I
IPC: A01N63/30
Filed: 1988-11-17
Granted: 1997-05-19
Abstract: A fungicidally active principle obtainable by cultivation of fungi of the genus Cercospora. The principle may be used for controlling fungi in plants and animals including mammals.
Patent KR-920007178-B1 (KR)
Inventor: KAWAKUCHI TAKEO
IPC: H01J29/07
Filed: 1988-12-14
Granted: 1992-08-27
Abstract: 내용 없음.
Patent KR-940000729-B1 (KR)
Inventor: IYORI YUSUKE
IPC: C04B41/52
Filed: 1987-08-13
Granted: 1994-01-28
Abstract: 내용 없음.
Patent KR-930007228-B1 (KR)
Title: Water pump
Inventor: HAN DAE-RIM
IPC: F04D13/08
Filed: 1989-03-02
Granted: 1993-08-04
Abstract: The structure for mounting axial submerged propeller pump  in drain pipe, prevents reverse rotation of pump  casing  in  priming pump and maintains sealing of gap between pump  casing  and  drain pipe. The structure  comprises  rotation  protecting  device  (2) combined with stopper (30) and fixing device (20); packing (3)  at the bottom of pump casing (1a); seat section (5) provided at lower side of drain pipe body (4), fixed by stationary reinforcing  body (6).
Patent KR-0156545-B1 (KR)
Inventor: RALTENBURGER WERNER
IPC: C12N15/863
Filed: 1989-06-03
Granted: 1998-11-16
Abstract: 내용 없음
Patent KR-930000158-B1 (KR)
Inventor: MORI SEICHI
IPC: H01L29/423
Filed: 1989-07-05
Granted: 1993-01-09
Abstract: 내용 없음.
Patent KR-920008063-B1 (KR)
Inventor: MORITA KATSUMI
IPC: H04N5/44
Filed: 1989-11-17
Granted: 1992-09-22
Abstract: 내용 없음.
Patent KR-970000896-B1 (KR)
Title: Method for making glass articles with defect-free surfaces and soluble glasses thereof
Inventor: COPPOLA FRANK
IPC: C03C17/02
Filed: 1989-12-12
Granted: 1997-01-21
Abstract: This invention is directed to a method for making a soda lime glass article having at least one surface which is essentially defect free and having a smoothness at least equivalent to that of a polished surface. The method generally comprises the steps of:   (a) bringing together a body of a soda lime glass and a body of a glass consisting essentially, by weight, of 0.75-7.5% Li2O and/or 18-27% PbO, the total Li2O+PbO not exceeding 32%, 35-50% BaO, 0-5% Al2O3, 30-50% B2O3, and 5-10% SiO2, said glass having a softening point between 575 DEG -650 DEG C, a coefficient of thermal expansion compatible with soda lime glass, and being at least 100 times more soluble in a particular solvent than soda lime glass, at a temperature wherein at least said more soluble glass is in fluid form to produce a laminate having an interface between the glass bodies which is essentially defect free;   (b) cooling said laminate; and thereafter (c) contacting the laminate with an acid solution to dissolve away said more soluble glass.
Patent KR-930000161-B1 (KR)
Inventor: TOBIDA YOUICHI
IPC: G11C11/409
Filed: 1989-12-22
Granted: 1993-01-09
Abstract: 내용 없음.
Patent KR-950013461-B1 (KR)
Title: Fransdermal multipolymer drug delivery system
Inventor: SABLOTSKY STEVEN
IPC: A61M37/00
Filed: 1989-02-21
Granted: 1995-11-08
Abstract: A dermal compositon comprising a drug, a multi-polymer of vinyl acetate, polyethylene and optionally one or more monomers, a natural or synthetic rubber and a tackifying agent. The ratio of the multipolymer to the rubber is, respectively, about 1:1 to about 10:1 and more preferably 1:1 to 5:1 and more preferably 3:1. The dermal composition can optionally contain a crosslinking agent, tackifiers, penetration enhancers and other ingredients known for use in adhesives for the transdermal delivery of drugs. The dermal compositions can be produced by a variety of methods known in the preparation of drug containing adhesive preparations including the homogenous mixing of the multi-polymer, drug and optional crosslinking agent and additional ingredients in aqueous solution followed by removal of excess water.
Patent KR-930001129-B1 (KR)
Title: Method for smelting reduction of ni ore
Inventor: TANABE HARUYOSHI
IPC: C21B13/00
Filed: 1990-02-03
Granted: 1993-02-18
Abstract: A method for smelting reduction of Ni ore which comprises charging Ni ore, carbonaceous material and flux into a converter type smelting reduction furnace (10) holding molten iron (11) therein and controlling a post-combustion ratio [ ( H2O + CO2) / ( H2+ H2O + CO + CO2) ] inside the smelting reduction furnace at 0.3 or more by blowing oxygen from a top-blow oxygen lance (21) and stirring gas from a bottom-blow tuyere (24) arranged in the bottom of the smelting reduction furnace into the smelting reduction furnace. A relation between the content of carbon [[C] (%)] in the molten metal and the ratio of slag in tons produced per ton of molten metal [S(T/HMT)] is represented with a formula:  [C] % >/= S ( T/HMT )/3  wherein:  C represents carbon S represents the ratio of slag in tons (T) produced per ton of molten metal (HMT)  T represents ton HMT represents molten metal ton i